[If] an animal is in difficult labor, and the fetus put forth its foreleg and drew it back, it is permissible for eating. [If] it put forth its head, although it drew it back, it is regarded as having been born. [If] one cuts off [part] of the fetus that is in her womb, it is permissible for eating; from the spleen or from the kidneys, it is prohibited to be eaten. This is the general rule: What is [part of] its body is prohibited; what is not [part of] its body is permissible.